Answers

Add 54/14 and 42/40

1^st number: 3 12/14, 2^nd number: 1 2/40

54/14 + 42/40 is 687/140.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 14 and 40 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 14 × 20 = 280,
   54/14 = 54 × 20/14 × 20 = 1080/280
3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
   42/40 = 42 × 7/40 × 7 = 294/280
4. Add the two like fractions:
   1080/280 + 294/280 = 1080 + 294/280 = 1374/280
5. 1374/280 simplified gives 687/140
6. So, 54/14 + 42/40 = 687/140
   In mixed form: 4127/140

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